KR100631006B1 - Gas Insulated Switchgear - Google Patents

Abstract

The present invention relates to a gas insulated switchgear of a dual drive type, the time delay power transmission means for performing the power transfer between the two arc contactor driven in the opposite direction to each other smoothly power transfer without intermittent operation due to the collision. In order to achieve this, a gas insulated switchgear having a slot guide member is provided.

Description

Gas Insulated Switchgear {A GAS INSULATED SWITCHGEAR}

1 and 2 show a conventional gas insulated switchgear,

1 is a side cross-sectional view showing a structure of a conventional gas insulated switchgear breaker in a closed state (ON state).

2 is a side cross-sectional view showing a state in which a conventional gas insulated switchgear breaker is operated in an open state (trip state).

3 to 6 illustrate a gas insulated switchgear according to an embodiment of the present invention.

3 is a side sectional view showing a structure of a gas insulated switchgear according to an embodiment of the present invention in a closed state (ON state).

4 to 6 are side cross-sectional views sequentially illustrating a process in which the gas insulated switchgear according to the embodiment of the present invention is operated in an open state (trip state).

<Description of the symbols for the main parts of the drawings>

100: first fixed contact 101: sliding groove

102: sliding mass 103: first link

104: second link 105: third link

106: fixing pin 107: hinge

110: first arc contact 120: third link

130: second link 140: fourth link

150: first link 151: fixed rotation axis

200: second fixed contact 210: second arc contact

220: fixed piston 230: nozzle

240: compression chamber 250: cylinder rod

300: movable contact 400: slot guide member

410: slot 500: connecting shaft

The present invention relates to a gas insulated switchgear, and in particular, in the dual drive type gas insulated switchgear in which one drive of two arc contactors is transmitted to the other by moving in opposite directions to be contacted or separated, after a time delay. The present invention relates to a gas insulated switchgear that is configured to transmit a drive and improves the power transmission structure to enable smooth power transmission and time study.

The gas insulated switchgear or gas insulated breaker is installed on the electric line and automatically cuts off the electric current safely when the current is opened or closed under normal use or when an accident current such as ground fault or short circuit occurs. As an electrical device that protects the equipment, such gas-insulated switchgear is a SOHO gas (e.g. SF ₆ ) gas having excellent insulation force compressed in the compression chamber when the switch is tripped. ) Is sprayed through the nozzle to extinguish the arc generated between the contacts during trip operation.

The structure and operating state of the above-described gas insulated switchgear will be described with reference to FIGS. 1 and 2.

1 and 2 show a conventional gas insulated switchgear,

1 is a side sectional view showing a structure of a conventional gas insulated switchgear breaker in a closed state (ON state), and FIG. 2 is a side sectional view showing a state in which a conventional gas insulated switchgear is operated in an open position (trip position).

As shown in FIG. 1, a blocking part of a conventional gas insulated switchgear includes a fixed side and a movable side.

The fixed side includes the first fixed contactor 100 and the first arc contactor 110.

The movable side includes a second fixed contactor 200, a movable contactor 300 movably installed in the second fixed contactor 200, and a fixed piston installed in the movable contactor 300 to form a cylinder 240. The second arc contactor 210 connected to or separated from the first arc contactor 110 while moving together with the movement of the movable contactor 300 and the nozzle fixed to the movable contactor 300. 220 and a connection rod (not shown) connecting the rod 250 of the movable contact 300 to a manipulator (not shown) of the opening and closing device.

The first end of the nozzle 220 is rotatably connected to the first link 103 around the connecting pin, and the first link 103 is rotatably connected to the pin in accordance with the movement of the first link 103 A second link 104 that is interlocked and rotates about the fixing pin 106, and one end of which is rotatably pinned to the second link 104 and the other end of which is connected to the delay means. It consists of.

The first arc contactor 110 has a sliding groove 411 having a predetermined length, and is connected to the third link 105 to slide in the sliding groove 411 to move from the third link 105. A sliding mass 102 for delaying the power of the sliding groove 411 by a moving time to the first arc contactor 110 is included.

In the conventional gas insulated switchgear having the above-described configuration, in the normal energized state, as shown in FIG. 1, the second arc contactor 210 is formed in contact with the movable contactor 300 and the second fixed contactor 200. 1 is connected to the arc contact 110 to maintain the electrical line closed state.

When the opening and closing device is tripped in the above state, as shown in FIG. 2, a force for pulling the rod 250 in the right direction (open direction) on the drawing is connected through a connecting rod connected to an external actuator not shown. The high speed trip operation is started to be transmitted, and the movable contact 300 and the second arc contact 210 connected to the rod 250 move together in the right direction on the drawing.

In this case, as described above, the movable contact 300, that is, the movable contact 300 and the second arc contact 210 move to the right side (opening direction) in the drawing and at the same time a plurality of links 103 connected to the front end of the nozzle 220. , 104 and 105 move the first arc contact 110 in a direction opposite to the moving direction on the movable side (left side in the drawing).

That is, when the first link 103 connected to the front end of the nozzle 220 moves in the right direction in the drawing, the second link 104 rotates in the counterclockwise direction around the fixing pin 106. As the second link 104 rotates, the third link 105 connected thereto moves in the left direction, and thus the sliding mass 102 connected to the third link 105 also slides 101. In the drawing, the linear movement moves to the left in the drawing.

Therefore, the first arc contact 110 is delayed by a predetermined time according to the movement time of the sliding mass 102 according to the moving distance of the sliding mass 102 determined by the length of the sliding groove 101. It is moved to the left in the drawing by the power transmitted through the contact.

The first arc contact 110, which is provided in the conventional gas insulated switchgear blocking unit having the above-described configuration, has the sliding mass 102 slidingly moved in the sliding groove 101 to end the sliding groove 101. The arc contact is formed so that the arc contact can be opened at a predetermined time interval after the main contact is opened by the structure which can be moved by a predetermined time delay by the time reaching.

However, in the conventional gas insulated switchgear having the structure as described above, the sliding mass 102 slides in the sliding groove 101 when the first arc contactor is driven after a predetermined time delay after the second arc contactor is driven. As such, the sliding mass 102 and the end of the sliding groove 101 collide with each other while reaching the end of the sliding groove 101.

As a result, the sliding mass 102 and the sliding groove 101 may be damaged, and the sliding mass 102 due to the reaction generated due to the collision does not come into contact with the end of the sliding groove 101. There is a problem that there is a section that does not have an unwanted intermittent operation.

Accordingly, the present invention has been made in order to solve the above problems, the present invention, when the second arc contactor after the predetermined time delay after driving the power of the second arc contactor to the first arc contactor smoothly without collision It is an object of the present invention to provide a gas insulated switchgear having a power transmission guide means for transmitting power to prevent a decrease in durability life due to a collision and an unwanted intermittent operation.

An object of the present invention, the first and the second fixed contactor which is installed to face each other at a predetermined distance, and the linear movable to the inside of the second fixed contactor to be movable in contact with or separated from the first fixed contactor A movable rod provided with the movable contactor, the cylinder rod being driven to the movable contactor to provide power for linear movement to the movable contactor, and provided inside the movable contactor and connected to one end of the cylinder rod and connected to the movable contactor. A second arc contactor which is movable and is provided inside the first fixed contactor and is provided relatively to the second arc contactor, and moves in a direction opposite to the moving direction of the second arc contactor to contact and separate from the second arc contactor. A first arc contactor capable of moving to a position to be moved, and connected to a distal end of the movable contactor to move together with the movable contactor In said gas-insulated switchgear apparatus comprising a nozzle for spraying the insulating gas during trip operation,

A plurality of links connected between the first arc contactor and the nozzle to transfer power from the second arc contactor to the first arc contactor such that the first arc contactor is moved in a direction opposite to the movement direction of the second arc contactor; And wherein the link is a first link rotatable about a fixed center of rotation axis, and a second linker connected to one end of the first link by a connecting shaft to rotate or linearly move the first link about the connecting shaft. A third link, one end of which is connected to the second link, the other end of which is connected to the nozzle, to transfer power from the nozzle to the second link, and one end of which is connected to the first link, and the other end of which is connected to the first arc contactor. A fourth link connected to convert the rotational force of the first link into linear power and transmit the same to the first arc contactor;

A slot having a section for guiding the connecting shaft of the second link and the third link to rotate and a section for guiding the horizontal movement, wherein only the second link is rotated in the rotation section and the first link is stopped, thereby providing a first arc. The contactor stops, and the first arc rotates in accordance with the horizontal movement of the second link in the horizontally moving section, thereby linearly moving the first arc contactor through the fourth link, thereby moving the power from the nozzle to the first arc. It can be achieved by providing a gas insulated switchgear according to the invention characterized in that it comprises a; and a slot guide member that can be delivered to the contact smoothly.

The object and construction of the present invention to achieve the object of the present invention will be more clearly understood by the following description with reference to the accompanying drawings showing preferred embodiments.

3 to 6 illustrate a gas insulated switchgear according to an embodiment of the present invention, and FIG. 3 is a side cross-sectional view showing a gas insulated switchgear according to an embodiment of the present invention to a closed state. .

As shown in FIG. 3, the gas insulated switchgear according to the embodiment of the present invention is installed to face each other at a predetermined distance, and each of the first fixed contactors 100 electrically connected to the power supply side and the load side, respectively, 2 includes a fixed contact 200.

The movable contactor 300 is provided to be linearly movable in and out of the second fixed contactor 200 in the second fixed contactor 200 so as to be movable in contact with and separated from the first fixed contactor 100.

The cylinder rod 250 is drive-connected to the movable contactor 300 by a drive connecting means such as a driving connecting pin (not shown) to transmit power from an external power source, for example, a motor, not shown. ) To provide power for linear movement.

The second arc contactor 210 may be provided inside the movable contactor 300 and may be connected to one end of the cylinder rod 250 to move together with the movable contactor 300.

The first arc contact 110 is relatively provided to face the second arc contact 210 inside the first fixed contact 100. In addition, the first arc contactor 110 may move in a direction opposite to the moving direction of the second arc contactor 210 to be in contact with or separated from the second arc contactor 210. The nozzle 230 is connected to the distal end of the movable contactor 300 and is movable together with the movable contactor 300, and is compressed in the compression chamber 240 during a trip operation (in a circuit breaking operation). ) And an insulating gas such as nitrogen gas are injected toward the second arc contactor 210.

The compression chamber 240 is formed of a fixed piston 220, a movable contact 300, and a nozzle 230 fixedly installed in the movable contact 300 so as not to move together with the movable contact 300. As the space for accommodating the insulating gas, as shown in FIG. 3, when the movable contactor 300 advances toward the first fixed contactor 100 (in the direction in which the circuit is closed), the space is expanded, and the insulating gas therein is expanded. As shown in FIG. 6, when the movable contact 300 is separated from the first fixed contact 100 and retracted (in the direction in which the circuit is opened), the space is narrowed, and the insulating gas therein is compressed.

A plurality of links 120, 130, 140, and 150 are connected between the first arc contactor 110 and the nozzle 230 so that the first arc contactor 110 may move in a direction opposite to the movement direction of the second arc contactor 210. Power from the second arc contactor 210 is transmitted to the first arc contactor 110. Here, the link is connected to the first link 150 which is rotatable about the fixed rotation shaft 151 and one end of the first link 150 by the connecting shaft C, and thus the first link 150 is stopped. The second link 130 and the one end is connected to the second link 130 and the other end is connected to the nozzle 230 to rotate the first link 150 by rotating or linearly moving around the connection axis (C) And the third link 120 for transmitting power from the nozzle 230 to the second link 130, one end of which is connected to the first link 150, and the other end of which is connected to the first arc contactor 110. It is configured to include a fourth link 140 for converting the rotational force of the first link 150 to linear power to transmit to the first arc contact 110.

The slot guide member 400 is fixedly installed at one position of the inner wall surface of the first fixed contactor 100 to guide the link so as to delay and transmit power from the nozzle 230 to the first arc contactor 110. As a means, it is provided with a slot portion 410 having a section for guiding the rotation axis of the connecting link 500 of the second link 130 and the third link 120 and the horizontal movement, the rotation In the section, only the second link 130 rotates and the first link 150 stops, thereby stopping the first arc contact 110, and in the horizontally moving section, according to the horizontal movement of the second link 130. The first link 150 rotates to linearly move the first arc contact 110 through the fourth link 140.

More specifically, the slot part 410 connects the shaft 500 of the second link 130 and the third link 120 so that only the second link 130 rotates while the first link 150 is stopped. Rotation guide section (410a, 410c) formed of at least one arc-shaped or oblique slot portion for guiding the rotation; As the first link 150 rotates in accordance with the horizontal movement of the second link 130, the connecting shaft 500 is horizontally moved to linearly move the first arc contactor 110 via the fourth link 140. It includes a horizontal moving guide section portion 410b of the horizontal guide.

Preferably, a roller that is movable while rolling or sliding in the slot portion 410 may be rotatably mounted on the connecting shaft 500 of the second link and the third link.

Reference numeral 160 is a member fixedly installed at the lower portion of the slot guide member 400 in the first fixed contactor 100 to support the rotation center shaft 151 of the first link 150.

The operation of the gas insulated switchgear according to the embodiment of the present invention having the above-described configuration will be described with reference to FIGS. 3 to 6 as follows.

3 to 6 are side cross-sectional views showing a state in which the gas insulated switchgear according to the embodiment of the present invention is operated.

First, a process of operating the gas insulated switchgear according to the embodiment of the present invention from the closed state (ON state) to the open state (trip state) will be described with reference to FIGS. 3 to 6. As shown in FIG. 3, the circuit between the power supply side and the load side where the first arc contactor 110 is in contact with the second arc contactor 210 is not shown in order to open the circuit between the power supply side and the load side from the closed state (ON state). When the power source is driven and the cylinder rod 250 connected to the power source is retracted to the right in the drawing, the second arc contactor 210 and the movable contactor 300 which are driven to be connected to the cylinder rod 250 are also first. It begins to retreat in the direction away from the fixed contact 100. Then, the nozzle 230 connected to the distal end of the second arc contactor 210 also retreats in the first fixed contactor 100 away from the first arc contactor 110 and to the right in the drawing. The third link 120 connected to the tip of the 230 retreats in the right direction in the drawing like the nozzle 230.

In the first step of the opening operation, as shown in FIG. 4, the connecting shaft 500 of the second link 130 and the third link 120 is guided in the rotation guide section 410a to be connected to the second link. 130 is rotated in the clockwise direction about the connecting shaft (C) with the first link 150, while the first link 150 is in a stopped state. Accordingly, the first arc contactor 110 remains stationary, and the first arc contactor 110 and the second arc contactor 210 are separated from each other by the retracting second arc contactor 210 but are not yet far from each other. Is not in a state. In addition, since the movable piston 300, the nozzle 230, and the second arc contactor 210 retreat while the fixed piston 220 is stopped, the insulating gas in the compression chamber 240 is compressed to form the first arc contactor. The arc generated between the first arc contactor 110 and the second arc contactor 210, which is started to be injected toward the 110 and is separated from the injected insulating gas, is extinguished.

Thereafter, as shown in FIG. 5, when the cylinder rod 250 is further retracted to the right side in the drawing, as shown in FIG. 5, the second arc contactor 210 and the movable contactor connected to the cylinder rod 250 are connected. 300 also retreats further in the direction away from the first fixed contact 100. Then, the nozzle 230 connected to the tip of the second arc contactor 210 also retreats in the right direction in the drawing, so that the third link 120 connected to the tip of the nozzle 230 is connected to the nozzle 230. Likewise, it retreats further toward the right in the drawing. Then, the connecting shaft 500 of the second link 130 and the third link 120 is guided to the right end of the horizontal movement guide section 410b in the horizontal movement guide section 410b, and thus the horizontal direction of the drawing. Dragged to the right, the first link 150 is rotated in the clockwise direction about the fixed rotation axis 151. Therefore, the fourth link 140 connected to the first link 150 moves horizontally to the left side in the drawing along the first link 150 that rotates to the left in the drawing, thereby connecting the first link connected to the fourth link 140. The arc contact 110 is also horizontally moved to the left in the drawing. Therefore, the first arc contactor 110 and the second arc contactor 210 are moved in opposite directions. The first arc contactor 110 and the second arc contactor 210 are farther apart from each other by the first arc contactor 110 and the second arc contactor 210 moving in opposite directions. In addition, since the movable piston 300, the nozzle 230, and the second arc contactor 210 retreat further from the stationary piston 220 in the stopped state, the insulating gas in the compression chamber 240 is further compressed to form the first contact. It is injected toward the arc contact 110.

Subsequently, as shown in the final third step of the opening operation as shown in FIG. 6, when the cylinder rod 250 is further retracted to the right in the drawing, the second arc contactor 210 driven to be connected to the cylinder rod 250 is connected. The movable contact 300 is further retracted in a direction away from the first fixed contact 100. Then, the nozzle 230 connected to the tip of the second arc contactor 210 also retreats in the right direction in the drawing, so that the third link 120 connected to the tip of the nozzle 230 is connected to the nozzle 230. Retreat further in the right direction as shown in the drawing. Then, the connecting shaft 500 of the second link 130 and the third link 120 is guided and moved in the rotation guide section 410c. At this time, the first link 150 is stopped and the second link is stopped. Only 130 is rotated clockwise. Therefore, the first arc contact 110 is stopped. Therefore, the first arc contactor 110 and the second arc contactor 210 are completely separated from each other by a predetermined distance and the electrical circuit is cut off (trip) to complete the operation. At this time, since the movable piston 300, the nozzle 230, and the second arc contact 210 are retracted farthest while the fixed piston 220 is stopped, the volume of the compression chamber 240 is most reduced. It becomes a state. In the operation of displacing the gas insulated switchgear according to the present invention from the blocking position of FIG. 6 to the closed position, that is, the position of FIG. 3, the operation state of FIGS. 6 to 3 is made in the reverse direction in reverse order, and detailed description thereof is omitted. I will.

As described above, according to the gas insulated switchgear according to the present invention, after the predetermined time delay after driving of the second arc contactor, power can be smoothly transmitted without collision when the power of the second arc contactor side is transmitted to the first arc contactor. By providing the power transmission guide means, there is an effect that the gas insulated switchgear that can prevent the reduction of durability life and unwanted intermittent operation by the collision of the conventional time delay power transfer means of the gas insulated switchgear.

Claims (3)

First and second fixed contacts installed to face each other at a predetermined distance, and movable contacts provided to be linearly movable inside the second fixed contact so as to be moved into contact with or separated from the first fixed contact; A cylinder rod drivingly connected to a movable contactor to provide power for linear movement to the movable contactor, and a second arc provided inside the movable contactor and connected to one end of the cylinder rod and movable together with the movable contactor A first contactor, which is provided inside the first fixed contactor and is provided relatively to the second arc contactor, and which is movable in a direction opposite to the moving direction of the second arc contactor to be in contact with and separated from the second arc contactor. It is connected to the arc contactor and the tip of the movable contactor to move together with the movable contactor, and insulated gas during trip operation. In the gas insulated switchgear comprising a nozzle for spraying, A plurality of links connected between the first arc contactor and the nozzle to transfer power from the nozzle to the first arc contactor such that the first arc contactor can be moved in a direction opposite to the movement direction of the second arc contactor; The link may include a first link rotatable about a fixed center of rotation axis, a second link connected to one end of the first link by a connecting shaft to rotate or linearly move around the connecting axis, and to rotate the first link. A third link having one end connected to the second link and the other end connected to the nozzle, the third link transmitting power from the nozzle to the second link, and one end connected to the first link and the other end connected to the first arc contactor. A fourth link converting the rotational force of the first link into linear power and transmitting the same to the first arc contactor; A slot having a section for guiding the connecting shaft of the second link and the third link to rotate and a section for guiding the horizontal movement, wherein only the second link is rotated in the rotation section and the first link is stopped, thereby providing a first arc. The contactor stops, and the first arc rotates in accordance with the horizontal movement of the second link in the horizontally moving section, thereby linearly moving the first arc contactor through the fourth link, thereby moving the power from the nozzle to the first arc. And a slot guide member capable of smoothly transmitting to the contactor. The method of claim 1, The connecting shaft between the second link and the third link further comprises a roller movable in the slot portion. The method of claim 1, wherein the slot of the slot guide member The first link includes a rotation guide section formed of at least one arc-shaped or diagonal slot portion for guiding the connecting shaft of the second link and the third link to rotate so as to rotate only the second link in a stationary state; And a horizontal horizontal guide section for guiding the connection axis horizontally so that the first link rotates in accordance with the horizontal movement of the second link to linearly move the first arc contactor via the fourth link. Gas insulated switchgear.

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